import java.util.Scanner;

public class Text {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String[] str = new String[]{scanner.nextLine()};
        if((str[0]!="+"||str[0]!="-")||(((char)str[0])<"0"&&str[0]>"9")){

        }
    }
}
